Add a domain alias in plesk panel

Adding a new domain alias is helpful in the following scenarios:

You want to make sure that the visitors can find your website regardless of the TLD they use. For example, you can register example.net and example.org, and use them as domain aliases pointing to your website example.com.
You want to make sure that visitors who mistype your domain name can find your website. For example, you can register exmaple.com and use it as a domain alias pointing to your website example.com.
You want to change the domain name of your website but also want visitors who use your old domain name to be able to find your website. For example, you want to change the domain name of your website from example.com to anotherexample.com. You can configure the example.com name to be a domain alias pointing to your new website anotherexample.com.

To add a new domain alias, go to Websites & Domains > Add Domain Alias.